Fuel Pressure omfg. Must have! Most underrated gauge on your car. You can spot a lingering fuel issue(this car WILL drop fuel pressure around 480hp on pump gas, if not by 500) and you are asking for problems. With a bigger fuel pump and other fuel system mods, fuel pressure becomes INCREASINGLY crucial. Find the problem, before it finds you.
After that, you cannot go wrong with oil press, AFR and of course boost is crucial, but if you run an EBC, such as the eboost2(this thing is serious good, much better than the HKS in my eyes, i like blitz next), you kill 2 birds with one stone, and the most important function of ANY boost gauge(PEAK HOLD BOOST). If you don't know your exact peak, you are not monitoring anything.
OBD scan tools are sweet too, for a quick 3-6 gauges in a single $200 shot, they arent great, but get the job done and datalong is great.
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